Electric assembly and vehicle having the same

ABSTRACT

An electric assembly includes. a box assembly, a motor, and a transmission. An mounting plate is disposed in the box assembly, and the mounting plate divides a space within the box assembly into a motor holding cavity and a transmission holding cavity. The motor is disposed in the motor holding cavity. The transmission is disposed in the transmission holding cavity, and the motor is power-coupled to the transmission such that the motor and the transmission are directly integrated through the box assembly without external connection of the motor and the transmission. The mounting plate is a monolithically integral part of the box assembly.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation application of U.S. patentapplication Ser. No. 16/969,400, filed on Aug. 12, 2020, which is anational phase entry under 35 U.S.C. § 371 of International ApplicationNo. PCT/CN2019/073413, filed on Jan. 28, 2019, which is based on andclaims priority to and benefits of Chinese Patent Applications Nos.201810146302.8 and 201820254974.6, both filed on Feb. 12, 2018. Thecontent of all of the above-identified applications is incorporatedherein by reference in their entireties.

FIELD

This application relates to the field of vehicle manufacturingtechnologies and, specifically, to an electric assembly and a vehiclehaving the electric assembly.

BACKGROUND

A motor assembly, a transmission assembly and a controller assemblyindividually disposed are used in a vehicle in the related art. Themotor assembly and the transmission assembly are connected togetherthrough a bolt. Box assemblies at connection locations have relativelylarge wall thicknesses and waste space, there are many and bulkycomponents, the loss is high, each assembly occupies a relatively largespace, the structure is insufficiently compact, mounting and maintenanceare difficult, costs are relative relatively high, and the entire massis large, which affects the endurance capability of the entire vehicle.

SUMMARY

The present disclosure aims to resolve at least one of the technicalproblems existing in the prior art. For this purpose, the presentdisclosure proposes an electric assembly, where the electric assemblyhas advantages such as a compact structure and a good cooling effect.

The present disclosure further provides a vehicle having the electricassembly.

To achieve the foregoing objective, according to an embodiment of afirst aspect of the present disclosure, an electric assembly isproposed. The electric assembly includes: a box assembly, where anmounting plate is disposed in the box assembly, and the mounting platedivides a space within the box assembly into a motor holding cavity anda transmission holding cavity; a motor, where the motor is disposed inthe motor holding cavity; a transmission, where the transmission isdisposed in the transmission holding cavity, and the motor ispower-coupled to the transmission such that the motor and thetransmission are directly integrated through the box assembly withoutexternal connection of the motor and the transmission, where themounting plate is a monolithically integral part of the box assembly.

Additionally, the electric assembly according to the foregoingembodiments of the present disclosure may further have the followingadditional technical characteristics.

According to an embodiment of the present disclosure, the transmissionholding cavity is configured to contain a cooling lubricating liquid tocool the box assembly, and the cooling lubricating liquid cools the boxassembly through the mounting plate.

According to an embodiment of the present disclosure, a distance betweenthe motor and the mounting plate is less than a preset distance suchthat the mounting plate cools the motor.

According to an embodiment of the present disclosure, at least one of asurface of the mounting plate facing the motor and a surface of themounting plate facing the transmission is provided with ribs.

According to an embodiment of the present disclosure, the ribs divide aspace between the mounting plate and the motor into a plurality ofcavities.

According to an embodiment of the present disclosure, the ribs includean annular rib extending along a circumferential direction of the motor.

According to an embodiment of the present disclosure, the ribs include aplurality of strip-shaped ribs extending along a radial direction of themotor, and the strip-shaped ribs are spaced apart along acircumferential direction of the mounting plate.

According to an embodiment of the present disclosure, heights of thestrip-shaped ribs relative to the mounting plate gradually decrease froma center portion of the mounting plate to a periphery portion of themounting plate.

According to an embodiment of the present disclosure, the box assemblyincludes a transmission box and a motor box, the transmission boxincludes a front box and a rear box, the motor box includes a motorhousing and a motor backend cover, the front box and the motor housingare disposed adjacent to each other, and the mounting plate is a part ofthe front box or a part of the motor housing.

According to an embodiment of the present disclosure, the front box andthe motor housing are integrally formed or detachably connected.

According to an embodiment of the present disclosure, the box assemblyincludes a transmission box and a motor box, the transmission boxincludes a front box and a rear box, the motor box includes a motorfrontend cover, a motor housing and a motor backend cover, and themounting plate is a part of the front box or a part of the motorfrontend cover.

According to an embodiment of the present disclosure, the electricassembly further includes a controller, where the controller is mountedoutside the box assembly and fixedly connected to the box assembly.

According to an embodiment of the present disclosure, the electricassembly further includes a conductive sheet, where the conductive sheetconnects to the controller and the motor.

According to an embodiment of a second aspect of the present disclosure,a vehicle is proposed. The vehicle includes the electric assemblyaccording to the embodiment of the first aspect of the presentdisclosure.

In the vehicle according to an embodiment of the present disclosure, theelectric assembly according to the first aspect of the presentdisclosure is used, where the electric assembly has advantages such as acompact structure and a good cooling effect.

The additional aspects and advantages of the present disclosure will beprovided in the following description, and some of the additionalaspects and advantages will become clear in the following description orbe understood through practice of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing and/or additional aspects and advantages of the presentdisclosure become more obvious and easily understood in descriptions ofthe embodiments with reference to the following accompanying drawings.

FIG. 1 is a schematic structural diagram of an electric assemblyaccording to an embodiment of the present disclosure;

FIG. 2 is a local cross-sectional view of an electric assembly accordingto an embodiment of the present disclosure;

FIG. 3 is an enlarged diagram of a location Din FIG. 2 ;

FIG. 4 is an exploded view of an electric assembly according to anembodiment of the present disclosure;

FIG. 5 is an exploded view of a box assembly of an electric assemblyaccording to an embodiment of the present disclosure;

FIG. 6 is a schematic local structural diagram of an electric assemblyaccording to an embodiment of the present disclosure;

FIG. 7 is a local cross-sectional view of an electric assembly accordingto an embodiment of the present disclosure;

FIG. 8 is a local cross-sectional view of an electric assembly accordingto another embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of an electric assemblyaccording to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of an electric assemblyaccording to an embodiment of the present disclosure;

FIG. 11 is a schematic local structural diagram of an electric assemblyaccording to another embodiment of the present disclosure;

FIG. 12 is a schematic local structural diagram of an electric assemblyaccording to another embodiment of the present disclosure;

FIG. 13 is a schematic local structural diagram of an electric assemblyaccording to another embodiment of the present disclosure;

FIG. 14 is a schematic local structural diagram of an electric assemblyaccording to another embodiment of the present disclosure;

FIG. 15 is a schematic local structural diagram of an electric assemblyaccording to another embodiment of the present disclosure;

FIG. 16 is a schematic local structural diagram of an electric assemblyaccording to another embodiment of the present disclosure;

FIG. 17 is an enlarged diagram of a location A in FIG. 15 ;

FIG. 18 is an exploded view of an electric assembly according to anembodiment of the present disclosure;

FIG. 19 is a schematic structural diagram of an oil pump of an electricassembly according to an embodiment of the present disclosure;

FIG. 20 is a schematic local structural diagram of an electric assemblyaccording to an embodiment of the present disclosure;

FIG. 21 is a schematic local structural diagram of an electric assemblyaccording to another embodiment of the present disclosure;

FIG. 22 is a schematic local structural diagram of an electric assemblyaccording to another embodiment of the present disclosure; and

FIG. 23 is a schematic structural diagram of a vehicle according to anembodiment of the present disclosure.

Reference numerals of the accompanying drawing: electric assembly 1;conductive member 10; conductive sheet 20; box assembly 100;transmission box 101; motor box 102; motor holding cavity 110;transmission holding cavity 120; mounting plate 160; strip-shaped rib161; cavity 162; annular rib 163; motor 200; transmission 400; oil pump13; mounting seat 135; spindle 134; driving gear 131; front box 180;rear box 190; motor housing 140; motor backed cover 150; motor frontendcover 170; first connection rib 181; second connection rib 182; thirdconnection rib 183; controller 500; conductive sheet 20; positioninginsert 206; motor body 203; leading wire 2031; connection device 204;supporting plate 205; leading wire 2031; motor connection end 2212;shaft via-hole 130; reinforcing rib 141; motor shaft 210; outer spline211; main shaft 300; shaft hole 310; inner spline 311; oil baffle 320;oil storage cavity 330; seal retainer ring 340; air vent 350; first gear410; second gear 420; third gear 430; differential assembly 440;transmission shaft 450; first bearing 510; second bearing 520; thirdbearing 530; fourth bearing 540; vehicle 11.

DETAILED DESCRIPTION

The following describes exemplary embodiments of the present disclosurein detail. Examples of the embodiments are shown in the accompanyingdrawings. The same or similar elements and the elements having same orsimilar functions are denoted by like reference numerals throughout thedescriptions. The following embodiments described with reference to theaccompanying drawings are exemplary, and are only to describe thepresent disclosure and cannot be construed as a limitation to thepresent disclosure.

An electric assembly 1 according to an embodiment of the presentdisclosure is described below with reference to the accompanyingdrawings.

As shown in FIG. 1 to FIG. 23 , the electric assembly 1 according to oneembodiment of the present disclosure includes a box assembly 100, amotor 200, a transmission 400 and a cooling lubricating liquid.

An mounting plate 160 is disposed in the box assembly 100, and themounting plate 160 divides a space within the box assembly 100 into amotor holding cavity 110 and a transmission holding cavity 120 that arearranged along an axial direction of a motor shaft 210. The motor 200 isdisposed in the motor holding cavity 110. The transmission 400 isdisposed in the transmission holding cavity 120, and the motor 200 ispower-coupled to the transmission 400. The cooling lubricating liquidfills the transmission holding cavity 120 and cools the box assembly100.

In the electric assembly 1 according to one embodiment of the presentdisclosure, the motor 200 and the transmission 400 are disposed in thebox assembly 100. Compared with the motor assembly in the related art inwhich the front box of the transmission and the frontend cover of themotor are connected, the motor 200 and the transmission 400 share a boxassembly 100, to implement the integrated design of the electricassembly 1, which not only may leave out a structure in which aplurality of box assemblies 100 are disposed, but also may leave out abolt required to connect the motor assembly and the transmissionassembly, so as to simplify the structure of the electric assembly 1,reduce the part quantity of the electric assembly 1, improve theintegration level of the electric assembly 1, and improve the productionefficiency of the electric assembly 1.

Moreover, the motor 200 and the transmission 400 share a box assembly100. Compared with the related art in which the motor assembly and thetransmission assembly are individually disposed, space may be saved, tohelp shorten an axial distance of the electric assembly 1, so that thestructure of the electric assembly 1 is compact and proper, therebyimproving the space utilization of the electric assembly 1, andfacilitating the disposition of the electric assembly 1; andfacilitating mounting and repair of the electric assembly 1, and helpingimprove reliability and stability of the electric assembly 1.

Moreover, the motor 200 and the transmission 400 share a box assembly100, and therefore components used for integration of the motor 200 andthe transmission 400 may be reduced, thereby helping reduce the weightof the electric assembly 1. For example, when the electric assembly 1 isapplied to a vehicle 11, the entire weight of the vehicle 11 may bereduced, thereby helping reduce costs of the vehicle 11, reducing theenergy loss of the vehicle 11, improving the operating efficiency of thevehicle 11, and improving the endurance capability of the vehicle 11.

Moreover, the box assembly 100 is disposed, the mounting plate 160 isdisposed in the box assembly 100, and clamping needs to be performedonly once during assembly, to facilitate assembly and forming of theelectric assembly 1, help reduce the error of the electric assembly 1,facilitate mounting and disposition of the motor 200 and thetransmission 400, improve coaxiality and radial mounting accuracy of themotor 200 and the transmission 400, and help improve the operatingperformance of the electric assembly 1.

Further, the cooling lubricating liquid fills the transmission holdingcavity 120 and the cooling lubricating liquid may cool the box assembly100. In this way, the transmission 400 may be cooled by using thecooling lubricating liquid, to help control the temperature range of thetransmission 400 and ensure the normal operating performance of thetransmission 400. Because the cooling lubricating liquid may cool thebox assembly 100 at the same time, the temperature range of the boxassembly 100 may be controlled to make the box assembly 100 stably runwithin a proper temperature range, and the motor 200 in the box assembly100 may be further cooled through the box assembly 100, thereby helpingimprove the entire heat dissipation performance of the electric assembly1 and improve the operating reliability and stability of the electricassembly 1.

Because the cooling lubricating liquid may cool the box assembly 100,and compared with the cooling manner for the electric assembly in therelated art, the cooling lubricating liquid not only may cool thetransmission 400 but also may cool the box assembly 100, the electricassembly 1 may be fully cooled by the cooling lubricating liquid, andthe cooling evenness throughout the electric assembly 1 may be improved,to enhance the cooling effect of the electric assembly 1 and improve thecooling reliability of the electric assembly 1.

Therefore, the electric assembly 1 according to one embodiment of thepresent disclosure has advantages such as a compact structure and a goodcooling effect.

An electric assembly 1 according to an embodiment of the presentdisclosure is described below with reference to the accompanyingdrawings.

In some specific embodiments of the present disclosure, as shown in FIG.1 to FIG. 23 , the electric assembly 1 according to one embodiment ofthe present disclosure includes a box assembly 100, a motor 200, atransmission 400 and a cooling lubricating liquid.

Specifically, the mounting plate 160 is constructed as a part of the boxassembly 100, and the cooling lubricating liquid cools the box assembly100 through the mounting plate 160. In this way, the disposition of themounting plate 160 is facilitated, and heat may be transferred throughthe mounting plate 160, to improve the entire cooling effect of theelectric assembly 1. For example, the mounting plate 160 may be cooledthrough the cooling lubricating liquid in the transmission holdingcavity 120, and the box assembly 100 transfers heat through the mountingplate 160, to further cool the motor housing 140, thereby cooling themotor 200 in the motor housing 140.

According to an embodiment of the present disclosure, the mounting plate160 is constructed as a part of a front box 180, and because lubricatingliquid in the transmission cools the front box 180, the mounting plate160 and the box assembly 100, for example, a motor housing 140 and atransmission box 101 may also be cooled. For example, the cavities 162are formed between the ribs of the mounting plate 160, and therefore,the air flowing through the cavities 162 is also cooled accordingly, andthe motor 200 may be cooled by using the air flowing through thecavities 162, to help improve the heat dissipation performance of theelectric assembly 1. In short, the lubricating liquid passing throughthe transmission 400 may cool the motor housing 140 and the housing ofthe transmission 400 at the same time.

According to another embodiment of the present disclosure, the mountingplate 160 is constructed as a part of the motor housing 140, and becauselubricating liquid in the motor cools the motor housing 140, and mayalso cool the mounting plate 160 and transfer heat through the mountingplate 160, so that the transmission box 101 may also be cooled, therebycooling the box assembly 100 and improving the entire cooling effect ofthe electric assembly 1. In short, the lubricating liquid passingthrough the motor 200 may also cool the motor housing 140 and thetransmission 400 at the same time.

In an embodiment, as shown in FIG. 19 , the electric assembly 1 furtherincludes an oil pump 13, where the oil pump 13 is disposed on the boxassembly 100 and configured to transport the cooling lubricating liquidin the transmission holding cavity 120 to the transmission 400 and themounting plate 160. In this way, the cooling lubricating liquid may bedriven by using the oil pump 13 to flow in the box assembly 100, and thecooling lubricating liquid is transported to the mounting plate 160, tohelp cool the mounting plate 160. Further, the box assembly 100transfers heat through the mounting plate 160, to help cool the motorhousing 140, thereby cooling the motor 200 in the motor housing 140,further improving the cooling effect of the transmission 400 and themounting plate 160, and cooling the motor 200 through the mounting plate160, so as to further improve the entire cooling effect of the electricassembly 1.

Specifically, the motor housing 140 may be provided with a motor coolingliquid passage that may cool the motor 200, the motor housing 140 issleeved over the periphery of a stator, so as to have cooling and heatdissipation effects on the stator, and the mounting plate 160 isdisposed on a side of an end of the motor 200, to mainly perform coolingand heat dissipation on the end and a coil of the motor 200, therebyfully cooling the motor 200. The two cooling manners have respectivefocuses, to jointly achieve a full cooling effect. On the other hand,the transmission 400 is cooled through the motor cooling liquid of themotor 200, and meanwhile the lubricating cooling liquid of thetransmission 400 cools the motor 200, to reinforce the cooling effect onthe electric assembly 1 through a combination of the two, therebyjointly achieving a full cooling effect on the electric assembly 1.

In an embodiment of the present disclosure, as shown in FIG. 20 , theoil pump 13 is mounted in the box assembly 100, and the oil pump 13 isin transmission connection to the transmission 400 and is driven by thetransmission 400. In this way, the oil pump 13 is driven by thetransmission 400 to transport the cooling lubricating liquid to thetransmission 400, and oil line disposition of the electric assembly 1may be facilitated, to help the electric assembly 1 be more fullylubricated and cooled.

Furthermore, the transmission 400 is lubricated by using the oil pump13, and the electric assembly 1 does not have a high requirement onspace arrangement of a gear shaft. Even if the gear shaft is arrangedhigher than an oil liquid surface, key parts can still be lubricated intime. Therefore, an arrangement angle of the electric assembly 1 on theentire vehicle is broader, a proper mounting angle of the power assemblymay be obtained through adjustment according to the arrangement of theentire vehicle, and the adaptability is relatively high.

Moreover, the oil pump 13 is driven through the transmission 400 to run,no additional power (for example, motor) needs to be disposed to drivethe oil pump 13, the structure is simple, and the adaptability is good;and the amount of the cooling lubricating liquid may be adjustedaccording to the vehicle speed, and the lubricating efficiency isrelatively high.

Furthermore, as shown in FIG. 19 , the oil pump 13 has a mounting seat135, and the oil pump 13 is mounted on an inner wall of the transmissionholding cavity 120 through the mounting seat 135. Specifically, themounting seat 135 is disposed on the bottom of the oil pump 13, themounting seat 135 is provided with a mounting hole, and a bolt isinserted into the mounting hole and is in threaded connection to theinner wall of the transmission box 101, so that the fixing effect of theoil pump 13 and the inner wall of the transmission box 101 is good.Moreover, the oil pump 13 is disposed in the transmission 400,transmission may be performed by using power in the electric assembly 1,and no external space is occupied.

Specifically, as shown in FIG. 19 , the oil pump 13 includes a spindle134, where the spindle 134 is connected to a driving gear 131, thedriving gear 131 is in transmission connection to the transmission 400,and the oil pump 13 is in transmission connection to the driving gear131 through the spindle 134 and is driven by the driving gear 131.Therefore, the rotation effect of the driving gear 131 is more stable.In this way, the driving gear 131 on the oil pump 13 may drive thespindle 134 to rotate to make the oil pump 13 pump oil. Therefore, noadditional motor needs to be disposed to drive the oil pump 13, and thedisplacement of the oil pump 13 depends on the rotational speed of adriven gear. When the vehicle speed is higher, that is, the rotationalspeed of the driven gear is also higher, the displacement of the oilpump 13 is also larger, and the lubricating effect of the transmission400 does not become poorer as the vehicle speed becomes higher; and whenthe vehicle speed is relatively low, that is, the rotational speed ofthe driven gear is relatively low, the transmission 400 requires arelatively small amount of the cooling lubricating liquid, and thedisplacement of the oil pump 13 is also low accordingly, to furtherimprove the lubricating efficiency on the transmission 400.

More specifically, the oil pump 13 is in transmission connection to thedriving gear 131 through the spindle 134. While the driving gear 131 isrotating, the spindle 134 is driven to rotate, and the spindle 134 isconnected to a gear or paddle in the oil pump 13, thereby driving thegear or paddle in the oil pump 13 to rotate.

The driving gear 131 may be a metal gear or non-metal gear, and a mostlightweight gear may be selected according to an actual requirement.Therefore, the rotation effect of the driving gear 131 is more stable.The oil pump 13 may be a gear pump, and the spindle 134 may drive thegear in the oil pump 13 to rotate, so that the low-pressure coolinglubricating liquid sucked into the oil pump 13 becomes high-pressure oildischarged from the oil pump 13; or the oil pump 13 may be a paddlepump, and the spindle 134 may drive a paddle wheel in the oil pump 13 torotate, to increase the pressure of the cooling lubricating liquid. Theoil pump 13 of the electric assembly 1 in one embodiment of the presentdisclosure refers to a device that can transport the cooling lubricatingliquid to each key part of the transmission 400.

Specifically, the electric assembly 1 further includes an oiltransportation pipe, where the oil pump 13 transports the coolinglubricating liquid in the transmission holding cavity 120 to themounting plate 160 through the oil transportation pipe. In this way, itis convenient to smoothly transport the cooling lubricating liquid,improve the transport capability and cooling effect of the coolinglubricating liquid, further transport the cooling lubricating liquid tothe mounting plate 160, and cool the mounting plate 160. Further, thebox assembly 100 transfers heat through the mounting plate 160, and itis further convenient to cool the entire box assembly 100.

More specifically, the oil pump transports the cooling lubricatingliquid in the transmission holding cavity to the mounting plate and atleast one gear location and/or at least one bearing location and/or atleast one meshing location through the oil transportation pipe. In otherwords, the oil pump 13 may transport the cooling lubricating liquid toat least one of the gear location, the bearing location and the meshinglocation through the oil transportation pipe. The oil transportationpipe transports the cooling lubricating liquid in the transmission box101 to the oil pump 13, and then the oil pump 13 transports the coolinglubricating liquid to a driving bearing location, a driving gear, and ameshing location and a transmission bearing location of a firsttransmission gear. It may be understood that, the transporting, by theoil transportation pipe, the cooling lubricating liquid to a part of aspeed change mechanism 12 is merely to better understand the presentdisclosure, but cannot be understood as a limitation on the presentdisclosure.

According to another embodiment of the present disclosure, as shown inFIG. 21 and FIG. 22 , the oil pump 13 is mounted outside the boxassembly 100. In this way, a case in which the oil pump 13 is disposedto affect the internal structure of the box assembly 100 may be avoided,to improve the disposition flexibility of the oil pump 13. Moreover, arequirement of a key part such as a bearing or a gear on lubrication maybe met, and the lubricating effect is good.

Specifically, the oil pump 13 is driven through an external motor ordriven through a transmission mechanism of the transmission 400. In thisway, power may be provided for the oil pump 13, and the dispositionflexibility of the oil pump 13 is improved, to help the oil pump 13transport the cooling lubricating liquid, and help further improve thecooling performance of the electric assembly 1.

In an embodiment, an oil guiding passage making the transmission holdingcavity 120 and the oil pump 13 be in communication with each other isdisposed in a wall of the box assembly 100. Specifically, the oilguiding passage is formed in the wall of the box assembly 100 in apunching manner. In this way, it is convenient to smoothly transport thecooling lubricating liquid, and it is convenient for the coolinglubricating liquid to perform heat dissipation and temperature reductionon the electric assembly 1. Particularly, it may be convenient tolubricate the bearing and the spline. For example, the oil guidingpassage may be extended to the bearing or spline location, to directlytransport the cooling lubricating liquid to the bearing or splinelocation, thereby avoiding a case in which injection of the oil liquidaffects the cooling and lubricating effects.

Specifically, the oil pump 13 transports the cooling lubricating liquidin the transmission holding cavity 120 to the mounting plate 160 and atleast one gear location and/or at least one bearing location and/or atleast one meshing location through the oil guiding passage.Specifically, the oil pump 13 may transport the cooling lubricatingliquid to at least one of the gear location, the bearing location andthe meshing location through the oil guiding passage. In this way, it isnot only further convenient to transport the cooling lubricating liquidto the mounting plate 160, to help the cooling lubricating liquid coolthe mounting plate 160 and help transfer heat through the mounting plate160, but also convenient to improve the lubricating performance of theat least one of the gear location, the bearing location and the meshinglocation, to help the electric assembly 1 smoothly operate and helpimprove the reliability and stability of the electric assembly 1.

In an embodiment, a distance between the motor 200 and the mountingplate 160 is less than a preset distance. It should be understood hereinthat, the preset distance is a maximum distance making the mountingplate 160 cool the motor 200, and a person skilled in the art may learnthe preset distance through the rated voltage and rated current of theelectric assembly 1. For example, the distance between the motor 200 andthe mounting plate 160 may be less than 10 millimeters, and ispreferably 7.5 millimeters. Because the motor is close to the mountingplate 160, the motor 200 and the mounting plate 160 may be cooled at ashort distance between each other, and after the mounting plate 160 iscooled, the motor 200 can be quickly cooled. In an embodiment, as shownin FIG. 9 and FIG. 10 , a surface of the mounting plate 160 facing themotor 200 and/or the transmission 400 is provided with ribs. Because theribs enhance the rigidity of the box assembly 100 and improve thenatural frequency, resonance may be prevented from occurring in theelectric assembly 1, to reduce the noise of the electric assembly 1. Inthis way, the contact area between the cooling lubricating liquid andthe mounting plate 160 may be increased, so that the cooling lubricatingliquid cools the mounting plate 160 more fully.

Specifically, during rotation of the motor 200, a stress is transferredto the box assembly 100 through a bearing, and ribs are added to the boxassembly 100, to help increase rigidity and strength of the box assembly100, prevent the box assembly 100 from being in contact with a coil ofthe motor 200, prevent components of the motor 200 from being damaged,and further improve operating reliability and stability of the motor200.

Further, the ribs divide a space between the mounting plate 160 and themotor 200 into a plurality of cavities 162. In this way, forming of thecavities 162 is facilitated, so as to cool the motor 200 by using airpassing through the cavities 162.

According to an embodiment of the present disclosure, as shown in FIG.12 , the ribs include an annular rib 163 extending along acircumferential direction of the motor 200. In this way, rigidity andstrength of the box assembly 100 may be improved, the structurestability of the box assembly 100 may be improved, and the heatdissipation capability and the cooling effect of the box assembly 100may be improved.

According to another embodiment of the present disclosure, as shown inFIG. 10 , the ribs include strip-shaped ribs 161 extending along aradial direction of the motor 200, there are a plurality of strip-shapedribs 161 and the plurality of strip-shaped ribs 161 are spaced apartalong a circumferential direction of the mounting plate 160. In thisway, a more even force may be applied to the box assembly 100, tofurther help improve rigidity and strength of the box assembly 100,further help improve noise reduction performance and heat dissipationperformance of the electric assembly 1, and improve the cooling effectof the electric assembly 1.

According to another embodiment of the present disclosure, the ribsinclude an annular rib 163 extending along a circumferential directionof the motor 200 and strip-shaped ribs 161 extending along a radialdirection of the motor 200, there are a plurality of strip-shaped ribs161 and the plurality of strip-shaped ribs 161 are spaced apart along acircumferential direction of the mounting plate 160. In this way,rigidity and strength of the box assembly 100 along the circumferentialdirection and the radial direction of the motor 200 may be improved atthe same time, thereby improving the structure reliability of the boxassembly 100, further improving the heat dissipation area of the boxassembly 100, and improving heat dissipation and cooling performance ofthe electric assembly 1.

Specifically, heights of the strip-shaped ribs 161 relative to themounting plate 160 gradually decrease from a center portion of themounting plate to a periphery portion of the mounting plate. In thisway, the disposition space of the strip-shaped ribs 161 may be reduced,to prevent the strip-shaped ribs 161 from occupying excessive space inthe box assembly 100, and further facilitate mounting and disposition ofthe motor 200 and the transmission 400. On the other hand, the heightsof the strip-shaped ribs 161 relative to the mounting plate 160gradually decrease from a center portion of the mounting plate to aperiphery portion of the mounting plate, and the center portion has alargest height, and may bear a high strength load formed by a bearing onthe box assembly 100.

According to an embodiment of the present disclosure, the box assembly100 includes a transmission box 101 and a motor box 102, thetransmission box 101 includes a front box 180 and a rear box 190, themotor box 102 includes a motor housing 140 and a motor backend cover150, the front box 180 and the motor housing 140 are disposed adjacentto each other, and the mounting plate 160 is constructed as a part ofthe front box 180 or a part of the motor housing 140. In this way, it isconvenient for the electric assembly 1 to become a three-segmentstructure, forming of the transmission holding cavity 120 and the motorholding cavity 110 is facilitated, and mounting and dismounting of theelectric assembly 1 are facilitated. Moreover, the mounting plate 160 isa part of the front box 180 or a part of the motor housing 140, and themounting plate 160 is integrated on the box assembly 100, so that thestructure of the box assembly 100 may be made more proper and compact,and the mounting plate 160 may be cooled by the lubricating liquid ofthe transmission 400, thereby improving the lubricating and coolingeffect of the mounting plate 160.

Further, the front box 180 and the motor housing 140 are integrallyformed or detachably connected. In this way, the electric assembly 1 maybe a three-segment structure, to facilitate the disposition of the motor200 and the transmission 400.

According to another embodiment of the present disclosure, as shown inFIG. 9 and FIG. 10 , the box assembly 100 includes a transmission box101 and a motor box 102, the transmission box 101 includes a front box180 and a rear box 190, the motor box 102 includes a motor frontendcover 170, a motor housing 140 and a motor backend cover 150, and themounting plate 160 is constructed as a part of the front box 180 or apart of the motor frontend cover 170. In this way, it is convenient forthe electric assembly 1 to become a three-segment structure, forming ofthe transmission holding cavity 120 and the motor holding cavity 110 isfacilitated, and mounting and dismounting of the electric assembly 1 arefacilitated. Moreover, the mounting plate 160 is a part of the front box180 or a part of the motor housing 140, and the mounting plate 160 isintegrated on the box assembly 100, so that the structure of the boxassembly 100 may be made more proper and compact, and the mounting plate160 may be cooled by the lubricating liquid of the transmission 400,thereby improving the lubricating and cooling effect of the mountingplate 160.

According to an embodiment of the present disclosure, as shown in FIG. 2, the motor housing 140, the motor frontend cover 170 and the front box180 are integrally formed or each two of the motor housing 140, themotor frontend cover 170 and the front box 180 are detachably connected.In this way, the structure flexibility of the box assembly may beimproved, to facilitate optimization of the structure of the boxassembly 100, facilitate reduction of the weight of the box assembly100, and improve the endurance capability of the electric assembly 1.

According to another embodiment of the present disclosure, the motorfrontend cover 170 and the front box 180 are integrally formed, and themotor housing 140 and the motor frontend cover 170 are detachablyconnected. In this way, simplification of the assembly process of thebox assembly 100 is facilitated, thereby improving the assemblyefficiency of the box assembly 100.

According to another embodiment of the present disclosure, the motorfrontend cover 170 and the motor housing 140 are integrally formed, andthe motor frontend cover 170 and the front box 180 are detachablyconnected. In this way, mutual separation between the transmission box101 and motor box 102 is facilitated, to help improve the structureflexibility of the box assembly 100.

According to another embodiment of the present disclosure, the motorhousing 140 is connected to the motor frontend cover 170 through a bolt,the motor frontend cover 170 is connected to the front box 180 through abolt, and the motor housing 140 is connected to the motor backend cover150 through a bolt. In this way, machining and forming of the motorhousing 140, the motor frontend cover 170, the front box 180 and therear box 190 are facilitated, so as to simplify the forming process. Themotor housing 140 the front box 180 the rear box 190 the motor backendcover 150 the motor housing 140 the front box 180 the motor housing 140.Because each of the motor frontend cover 170, the motor housing 140 andthe motor backend cover 150 is detachable, the length of the motor 200may be adjusted. For example, the length of the motor housing 140 as astandard member may be individually adjusted, thereby improving thestructure flexibility and the application range of the motor 200.

Specifically, as shown in FIG. 9 , one or more of a first connection rib181, a second connection rib 182 and a third connection rib 183 areconnected between an outer surface of the front box 180 and an outersurface of the motor housing 140, the first connection rib 181 isconnected between (an up-down direction is shown by an arrow Ain FIG. 9) an upper end face of the motor housing 140 and an upper end face ofthe front box 180, the second connection rib 182 is connected between alower end face of the motor housing 140 and a lower end face of thefront box 180, and the third connection rib 183 is located between thefirst connection rib 181 and the second connection rib 182. In this way,the strength of connection between the front box 180 and the motorhousing 140 may be reinforced, to avoid a case in which a point withweak strength occurs in a connection location between the front box 180and the motor housing 140 to cause deformation or damage, therebyimproving the entire structure performance of the box assembly 100.

In an embodiment, as shown in FIG. 3 , the transmission 400 includes amain shaft 300, the main shaft 300 is power-coupled to a motor shaft 210of the motor 200, at least one of the motor shaft 210 and the main shaft300 is threaded through a shaft via-hole 130 and is connected to theother one, and the main shaft 300 is connected to the motor shaft 210 ofthe motor 200 through splines. In this way, direct transmission betweenthe motor shaft 210 and the main shaft 300 is facilitated, and anadditional transmission structure may be left out, to further simplifythe structure of the electric assembly 1, improve the integration levelof the electric assembly 1, help transfer power outputted by the motor200 to the transmission 400 in time, help improve the transmissionefficiency of the electric assembly 1, and help improve timeliness andaccuracy of power transmission of the electric assembly 1. In this way,the main shaft 300 and the motor shaft 210 may be fixed and positionedby using splines, to prevent relative rotation from occurring betweenthe main shaft 300 and the motor shaft 210, facilitate reliabletransmission of the electric assembly 1, and help ensure transmissionefficiency of the electric assembly 1. In this way, another structureconnecting the main shaft 300 and the motor shaft 210 may be left out,thereby further simplifying the structure of the electric assembly 1,and improving the integration level of the electric assembly 1, andbecause the main shaft 300 and the motor shaft 210 are sleeved over eachother, the shaft spacing of the electric assembly 1 is furthershortened, so as to further control the size of the electric assembly 1in the axial direction of the motor shaft 210.

Further, as shown in FIG. 2 , the main shaft 300 is provided with ashaft hole 310, an inner circumferential surface of the shaft hole 310is provided with inner splines 311, an outer circumferential surface ofthe motor shaft 210 is provided with outer splines 211, the motor shaft210 of the motor 200 is matched in the shaft hole 310 and the innersplines 311 match the outer splines 211. In this way, machining of theinner splines 311 is facilitated, to help improve machining precision ofthe inner splines 311. Through the matching between the inner splines311 and the outer splines 211, transmission connection between the mainshaft 300 and the motor shaft 210 may be implemented, and reliablepositioning between the main shaft 300 and the motor shaft 210 may beimplemented, to further prevent relative rotation from occurring betweenthe main shaft 300 and the motor shaft 210. Moreover, the motor 200 is athree-segment motor, the main shaft 300 and the motor shaft 210 aresleeved over each other, and the length of the motor 200 may be adjustedaccording to a requirement, to help change torque and power of the motor200, and help improve compatibility of the motor 200.

Specifically, the shaft hole 310 runs through the main shaft 300 alongan axial direction of the main shaft 300, an oil baffle 320 is matchedin the shaft hole 310, the oil baffle 320, an inner circumferential wallof the shaft hole 310 and the motor shaft 210 jointly define an oilstorage cavity 330, the oil storage cavity 330 is filled withlubricating oil, and the oil baffle 320 is provided with an air vent350. In this way, the disposition of the lubricating oil is facilitated,and the lubricating oil in the shaft hole 310 can be effectivelyprevented from leaking, to play a role of protecting a splinelubricating system. In this way, the main shaft 300 may have an oilstorage function, the splines may be lubricated and cooled, the air vent350 may discharge generated gas at the right time, and the dispositionof the shaft hole 310 running through along the axial direction of themain shaft 300 may avoid a case in which gas exists in the shaft hole310 to affect mounting of the motor shaft 210 and the main shaft 300.

More specifically, a seal retainer ring is matched between the oilbaffle 320 and the shaft hole 310 and between the outer circumferentialsurface of the motor shaft 210 and the inner circumferential surface ofthe shaft hole 310. In this way, it is convenient to seal the oilstorage cavity 330, and the lubricating oil in the oil storage cavity330 may be prevented from leaking, thereby improving the seal effect ofthe oil storage cavity 330.

Specifically, as shown in FIG. 2 , the electric assembly 1 furtherincludes a plurality of bearings, and the plurality of bearings arerespectively sleeved over the motor shaft 210 and the main shaft 300 andare spaced apart along the axial direction of the motor shaft 210 andthe main shaft 300. In this way, smooth rotation of the motor shaft 210and the main shaft 300 is facilitated, to help improve reliability andaccuracy of rotation of the motor shaft 210 and the main shaft 300.

According to an embodiment of the present disclosure, as shown in FIG. 8, the plurality of bearings include a first bearing 510, a secondbearing 520 and a third bearing 530, the first bearing 510 and thesecond bearing 520 are respectively disposed adjacent to two ends of themain shaft 300, and the third bearing 530 is disposed adjacent to oneend of the motor shaft 210 far away from the main shaft 300. In thisway, the disposition of the motor shaft 210 and the main shaft 300 isfacilitated, to further facilitate smooth rotation of the motor shaft210 and the main shaft 300, and the quantity of the bearings may bereduced, to reduce costs of the electric assembly 1.

Specifically, the third bearing 530 is disposed between one end of themotor shaft 210 far away from the transmission 400 and the box assembly100, the first bearing 510 is disposed between one end of the main shaft300 far away from the motor 200 and the box assembly 100, and the secondbearing 520 is disposed between at least one of one end of the motor 200close to the main shaft 300 and one end of the main shaft 300 close tothe motor shaft 210 and the box assembly 100. In this way, the forceapplied to the motor shaft 210 and the main shaft 300 may be morebalanced, to help improve the operating performance of the electricassembly 1.

In an embodiment, the second bearing 520 is sleeved over the main shaft300 and is located on an overlap between the main shaft 300 and themotor shaft 210 in the axial direction. In this way, the second bearing520 may be used for supporting the main shaft 300 and the motor shaft210, to ensure the disposition reliability of the main shaft 300 and themotor shaft 210. Because the overlap between the main shaft 300 and themotor shaft 210 in the axial direction is a place on which rotationforms stress concentration, effective supporting of the second bearing520 may prevent the main shaft 300 and the motor shaft 210 from beingbroken, thereby improving the operating performance of the main shaft300 and the motor shaft 210.

According to another embodiment of the present disclosure, as shown inFIG. 7 , the electric assembly 1 further includes a fourth bearing 540,where the fourth bearing 540 is sleeved over the motor shaft 210 and islocated between the motor shaft 210 and the motor housing. In this way,the fourth bearing 540 may be used for reinforcing supporting on themotor shaft 210, thereby further improving the disposition reliabilityof the motor shaft 210.

Specifically, the fourth bearing 540 is located between the main shaft300 and a stator of the motor 200 in the axial direction of the motorshaft 210. In this way, the force applied to the main shaft 300 and themotor 200 may be more even, to help improve reliability and stability ofpower transfer between the main shaft 300 and the motor 200.

In an embodiment, as shown in FIG. 11 , an outer surface of the motorhousing 140 is provided with reinforcing ribs 141 arranged along theouter surface of the motor housing 140. In this way, it is convenient toimprove the strength of the motor housing 140, and the surface area ofthe motor housing 140 may be increased, thereby improving the heatdissipation performance of the motor housing 140.

Specifically, after the motor backend cover 150 is dismounted, thetransmission holding cavity 120 may be opened. In this way, it may beconvenient to replace and maintain the transmission 400.

Further, an end face of the motor holding cavity 110 far away from oneend of the transmission holding cavity 120 may be opened, and after themotor 200 is mounted to the box assembly 100, the motor backend cover150 covers the motor holding cavity 110.

In an embodiment, the motor housing 140 and the motor backend cover 150are mounted through bolts and the front box 180 and the rear box 190 aremounted through bolts. In this way, reliability and stability of thefixed connection between the motor housing 140 and the motor backendcover 150 and between the front box 180 and the rear box 190 may beensured, and when the electric assembly 1 has a fault, the box assembly100 may be quickly dismounted, to further facilitate maintenance of theelectric assembly 1.

Specifically, as shown in FIG. 2 , the first bearing 510 is located onthe motor backend cover 150, the second bearing 520 and the fourthbearing 540 are respectively disposed at two ends of the shaft via-hole130, and the third bearing 530 is located on an end face of the motorholding cavity 110 far away from the transmission holding cavity 120. Inthis way, the force applied to the main shaft 300 and the motor 200 maybe more even, to further help improve the structure stability of theelectric assembly 1.

More specifically, the main shaft 300 is provided with a first mainshaft positioning slot and a second main shaft positioning slot, thefirst bearing 510 is matched in the first main shaft positioning slot,and the second bearing 520 is matched in the second main shaftpositioning slot. The motor shaft 210 is provided with a third motorshaft positioning slot and a fourth motor shaft positioning slot, thethird bearing 530 is matched in the third motor shaft positioning slot,and the fourth bearing 540 is matched in the fourth motor shaftpositioning slot. The box assembly 100 is provided with box positioningslots matching the bearings. In this way, the positioning slots may beused for positioning the bearings, to facilitate reliable disposition ofthe bearings, and help improve location accuracy of the bearings.

In an embodiment, the electric assembly 1 can be directly mounted to thechassis of the vehicle 11 through a suspension mounting point on the boxassembly 100. In this way, mounting of the electric assembly 1 isfurther facilitated, improvement of the mounting efficiency of thevehicle 11 is facilitated, and the mounting costs of the vehicle 11 arereduced.

Specifically, as shown in FIG. 6 , the transmission 400 includes adifferential assembly 440, a first gear 410, a second gear 420, a thirdgear 430 and a transmission shaft 450, the first gear 410 is sleevedover the main shaft 300, the second gear 420 and the third gear 430 aresleeved over the transmission shaft 450, the first gear 410 is meshedwith the second gear 420, and the third gear 430 is meshed with thedifferential assembly 440. In this way, it is convenient for thetransmission 400 to implement speed change transmission.

In an embodiment, as shown in FIG. 1 , the box assembly 100 includes thecylindrical motor housing 140 and the front box assembly 180 of thetransmission connected to the motor housing 140, the motor holdingcavity 110 is disposed in the motor housing 140, the transmissionholding cavity 120 is disposed between the front box 180 and the rearbox 190, and the box of the transmission protrudes outward from theouter circumferential surface of the motor housing 140. In this way, itis convenient for the box assembly 100 to protect the electric assembly1.

Specifically, as shown in FIG. 6 , the axial line of the motor shaft 210is parallel to those of the main shaft 300, the transmission shaft 450and the differential assembly 440. In this way, it is convenient for theelectric assembly 1 to smoothly transfer power.

In an embodiment, the electric assembly 1 further includes a controller500, where the controller 500 is mounted outside the box assembly 100and fixedly connected to the box assembly 100. In this way, the integraldisposition of the controller 500 is facilitated, and an externalthree-phase line disposed between the controller 500 and the motor 200may be left out, to facilitate optimization of the structure of theelectric assembly 1, reduce costs of the electric assembly 1, preventmounting of the external three-phase line from affecting the seal effectof the electric assembly 1, prevent electric leakage from occurring inthe electric assembly 1, improve the operating efficiency of theelectric assembly 1, improve the anti-interference capability of theelectric assembly 1, and reduce the fault rate of the electric assembly1.

According to an embodiment of the present disclosure, as shown in FIG.13 , the electric assembly 1 further includes a conductive sheet 20,where the conductive sheet 20 is configured to connect the controller500 and the motor 200. For example, the conductive sheet 20 has acontroller connection end and a motor connection end, the controllerconnection end is used for connecting to the controller 500, forexample, connecting to a three-phase line of the controller 500, themotor connection end is used for connecting to the motor 200, forexample, connecting to a three-phase line of the motor 200, and theconductive sheet 20 is fixed to the controller 500 through a bolt. Inthis way, external three-phase lines and connection bases may be leftout, the length of the three-phase lines is reduced, the connection basestructure is left out, and costs are reduced.

Specifically, the motor 200 includes a motor body 203 and a connectiondevice 204, the connection device 204 is mounted on the motor body 203,the motor body 203 has a plurality of leading wires 2031, the connectiondevice 204 includes a plurality of conductive sheets 20, and theplurality of conductive sheets 20 are respectively connected to thecorresponding leading wires 2031, where the conductive sheet 20 has acontroller connection end, and the controller connection end of theconductive sheet 20 is used for directly connecting to the controller500.

In other words, the controller 500 is directly connected to thecontroller connection end at one end of the conductive sheet 20, and theother end of the conductive sheet 20 is connected to the leading wire2031 of the motor body 203 (the leading wire may be a leading wire of amotor winding). In this way, the controller 500 may control the motorbody 203, and the connection between the motor controller 100 and themotor body 203 through the conductive sheet 20 may make the entirestructure of the motor 200 more compact.

In some embodiments, the connection device 204 further includes asupporting plate 205, the supporting plate 205 is relatively fixedlymounted on the motor body 203, the supporting plate 205 is provided witha positioning insert 206, two ends of the positioning insert 206respectively stretch out of two opposite side surfaces on the supportingplate 205, a part of the conductive sheet 20 is inserted into thepositioning insert 206, and the controller connection end of theconductive sheet 20 stretches out of the positioning insert 206. Inother words, the supporting plate 205 is fixedly mounted on the motorbody 203, the positioning insert 206 stretches out of two sides of thesupporting plate 205, the conductive sheet 20 is inserted into thepositioning insert 206, and two ends of the conductive sheet partiallystretch out of the positioning insert 206 and are used for respectivelyconnecting to the leading wire 2031 and the controller connection end,where the positioning insert 206 provides supporting and positioning forthe conductive sheet 20.

Further, the plurality of conductive sheets 20 are disposed side by sideand spaced apart from each other. It may be understood that, theplurality of conductive sheets 20 spaced apart from each other mayprevent a case of short-circuit or confused connection from occurring.

That is to say, motor connection ends of conductive members 10 areconnected to the conductive sheets 20 in a one-to-one correspondence,the conductive member 10 and the conductive sheet 20 are electricallyconnected, and the conductive member 10 and the conductive sheet 20 aredirectly connected without a conducting wire or another connectiondevice. In this way, the line of the electric assembly 1 may beshortened, thereby improving the anti-interference capability, andgreatly saving the space.

In an embodiment, the conductive member 10 and the conductive sheet 20are in screw connection. The screw connection is self-lockingconnection, the connection is stable and not easy to be loose, anddismounting is convenient. Certainly, the foregoing embodiment is onlyschematic, and cannot be understood as a limitation on the protectionscope of the present disclosure. For example, the conductive member 10and the conductive sheet 20 may be in insertion connection, stickingconnection, welding connection, riveting connection or the like.

According to another embodiment of the present disclosure, as shown inFIG. 16 , the electric assembly 1 further includes a conductive sheet20, where the conductive sheet 20 is stuck in the controller 500 or theconductive sheet 20 is fixed to the controller 500 through a bolt. Theconductive sheet 20 has a controller connection end and a motorconnection end, the controller connection end is used for connecting tothe controller 500, for example, connecting to a three-phase line of thecontroller 500, the motor connection end is used for connecting to themotor 200, for example, a three-phase line of the motor 200, and theconductive sheet 20 is stuck in the controller 500. In this way,dismounting and mounting of the conductive sheet 20 are facilitated,external three-phase lines and connection bases may be left out, thelength of the three-phase lines is reduced, the connection basestructure is left out, and costs are reduced.

Specifically, the electric assembly 1 includes a motor 200 and acontroller 500. The motor 200 includes a motor body 203 and a connectiondevice 204, the connection device 204 is mounted on the motor body 203,the motor body 203 has a plurality of leading wires 2031, the connectiondevice 204 includes a plurality of conductive sheets 20, and theplurality of conductive sheets 20 are respectively connected to thecorresponding leading wires 2031, where the conductive sheet 20 has acontroller connection end. The motor controller 100 is mounted on themotor 200, the motor controller 100 has a conductive member 10, and theconductive member 10 has a power supply connection end used forconnecting to a power supply and a motor connection end 2212 used fordirectly connecting to the motor 200, where one of the motor connectionend 2212 of the conductive member 10 and the controller connection endof the conductive sheet has an insertion structure and the other one andthe insertion structure are in insertion connection.

In other words, the power supply connection end of the conductive member10 is connected to the power supply, and the motor connection end 2212of the conductive member 10 and the controller connection end of theconductive sheet 20 are connected. That is to say, the motor controller100 is directly connected to the controller connection end at one end ofthe conductive sheet 20, and the other end of the conductive sheet 20 isconnected to the leading wire 2031 of the motor body 203 (the leadingwire 2031 may be a leading wire of a motor winding). In this way, themotor controller 100 may control the motor body 203, and the connectionbetween the motor controller 100 and the motor body 203 through theconductive sheet 20 may make the entire structure of the motor 200 morecompact.

Moreover, the motor connection end 2212 of the conductive member 10 andthe conductive sheet 20 of the motor 200 are connected through aninsertion structure. It may be understood that, compared with aninsulation line wiring manner, the insertion connection manner issimpler, procedures are simplified, and the time is saved. Moreover,when a bumping case is encountered, integrity of the conductive sheet 20of the motor may be ensured, and occurrence of cases such as bending theconductive sheet 20 and breaking the conductive sheet 20 is reduced.

That is to say, motor connection ends 2212 of conductive members 10 areconnected to the conductive sheets 20 in a one-to-one correspondence,the conductive member 10 and the conductive sheet 20 are electricallyconnected, and the conductive member 10 and the conductive sheet 20 aredirectly connected without a conducting wire or another connectiondevice. In this way, the line of the electric assembly 1 may beshortened, thereby improving the anti-interference capability, andgreatly saving the space.

In some embodiments, the conductive sheet 20 is provided with a stopgroove, the insertion structure is provided with a stop protrusion, andthe stop protrusion is properly buckled into the stop groove. When theinsertion structure and the conductive sheet 20 are connected, the stopprotrusion matches the stop groove. In this way, the contact areabetween an insertion sheet 2211 and the conductive sheet 20 may beincreased, and the insertion sheet 2211 may be prevented fromtransiently departing from the conductive sheet 20 during vibration, toprevent a case of undesired contact from occurring.

A vehicle 11 according to an embodiment of the present disclosure isdescribed below. The vehicle 11 according to one embodiment of thepresent disclosure includes the electric assembly 1 according to theforegoing embodiment of the present disclosure.

In the vehicle 11 according to one embodiment of the present disclosure,the electric assembly 1 according to one embodiment of the presentdisclosure is used, where the electric assembly has advantages such as acompact structure and a good cooling effect.

Other configurations and operations of the vehicle 11 according to theembodiments of the present disclosure are known to those of ordinaryskill in the art and will not be described in detail herein.

In the description of the present disclosure, it should be understoodthat, orientations or position relationships indicated by terms such as“center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”,“up”, “down”, “front”, “rear”, “left”, “right”, “vertical”,“horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”,“counterclockwise”, “axial”, “radial”, and “circumferential” areorientations or position relationship shown based on the accompanyingdrawings, and are merely used for describing the present disclosure andsimplifying the description, rather than indicating or implying that theapparatus or element should have a particular orientation or beconstructed and operated in a particular orientation, and therefore,should not be construed as a limitation on the present disclosure.Moreover, features modified by “first” and “second” may explicitly orimplicitly include one or more features. In descriptions of the presentdisclosure, “a plurality of” means two or more, unless otherwise stated.

In the descriptions of the present disclosure, it should be noted that,unless otherwise clearly specified and defined, terms such as“mounting”, “interconnection”, and “connection” shall be understood in abroad sense, for example, may be a fixing connection, a detachableconnection, an integral connection, a mechanical connection, anelectrical connection, a direct connection, an indirect connection byusing an intermediate medium, and communication between interiors of twocomponents. A person of ordinary skill in the art may understandspecific meanings of the foregoing terms in the present disclosureaccording to a specific situation.

In the descriptions of this specification, descriptions such asreference terms “an embodiment”, “some embodiments”, “exemplaryembodiment”, “example”, “specific example”, or “some examples” indicatethat specific features, structures, materials, or characteristicsdescribed with reference to embodiments or examples are included in atleast one embodiment or example of the present disclosure. In thisspecification, exemplary descriptions of the foregoing terms do notnecessarily refer to a same embodiment or example. In addition, thedescribed specific feature, structure, material, or characteristic maybe combined in a proper manner in any one or more embodiments orexamples.

Although the disclosed embodiments of the present disclosure have beenshown and described, a person skilled in the art can understand that theabove embodiments cannot be construed to limit the present disclosure,and changes, alternatives, and modifications can be made in theembodiments without departing from the principle and the purpose of thepresent disclosure.

What is claimed is:
 1. An electric assembly, comprising: a box assembly,wherein an mounting plate is disposed in the box assembly, and themounting plate divides a space within the box assembly into a motorholding cavity and a transmission holding cavity; a motor, wherein themotor is disposed in the motor holding cavity; and a transmission,wherein the transmission is disposed in the transmission holding cavity,and the motor is power-coupled to the transmission such that the motorand the transmission are directly integrated through the box assemblywithout external connection of the motor and the transmission, whereinthe mounting plate is a monolithically integral part of the boxassembly.
 2. The electric assembly according to claim 1, wherein thetransmission holding cavity is configured to contain a coolinglubricating liquid to cool the box assembly, and the cooling lubricatingliquid cools the box assembly through the mounting plate.
 3. Theelectric assembly according to claim 1, wherein a distance between themotor and the mounting plate is less than a preset distance such thatthe mounting plate cools the motor.
 4. The electric assembly accordingto claim 1, wherein at least one of a surface of the mounting platefacing the motor and a surface of the mounting plate facing thetransmission is provided with ribs, and the ribs divide a space betweenthe mounting plate and the motor into a plurality of cavities.
 5. Theelectric assembly according to claim 4, wherein the ribs comprise anannular rib extending along a circumferential direction of the motor. 6.The electric assembly according to claim 4, wherein the ribs comprise aplurality of strip-shaped ribs extending along a radial direction of themotor, and the strip-shaped ribs are spaced apart along acircumferential direction of the mounting plate, and heights of at leasta part of the strip-shaped ribs relative to the mounting plate graduallydecrease from a center portion of the mounting plate to a peripheryportion of the mounting plate.
 7. The electric assembly according toclaim 1, wherein the box assembly comprises a transmission box and amotor box, the transmission box comprises a front box and a rear box,the motor box comprises a motor housing and a motor backend cover, thefront box and the motor housing are disposed adjacent to each other, andthe mounting plate is a part of the front box or a part of the motorhousing.
 8. The electric assembly according to claim 1, wherein: the boxassembly comprises a transmission box and a motor box, the transmissionbox comprises a front box and a rear box, the motor box comprises amotor frontend cover, a motor housing, and a motor backend cover, andthe mounting plate is a part of the front box or a part of the motorfrontend cover.
 9. An electric assembly, comprising: a box assembly,wherein an mounting plate is disposed in the box assembly, and themounting plate divides a space within the box assembly into a motorholding cavity and a transmission holding cavity; a motor, wherein themotor is disposed in the motor holding cavity; a transmission, whereinthe transmission is disposed in the transmission holding cavity, and themotor is power-coupled to the transmission; and a conductive sheet and acontroller, wherein: the box assembly comprises a transmission box and amotor box, the transmission box comprises a front box and a rear box,the motor box comprises a motor housing and a motor backend cover, thefront box and the motor housing are disposed adjacent to each other, themounting plate is a part of the front box or a part of the motorhousing, and the conductive sheet connects to the controller and themotor.
 10. The electric assembly according to claim 9, wherein thecontroller is mounted outside the box assembly and fixedly connected tothe box assembly.
 11. A vehicle comprising an electric assembly, whereinthe electric assembly comprises: a box assembly, wherein an mountingplate is disposed in the box assembly, and the mounting plate divides aspace within the box assembly into a motor holding cavity and atransmission holding cavity; a motor, wherein the motor is disposed inthe motor holding cavity; a transmission, wherein the transmission isdisposed in the transmission holding cavity, and the motor ispower-coupled to the transmission such that the motor and thetransmission are directly integrated through the box assembly withoutexternal connection of the motor and the transmission, wherein themounting plate is a monolithically integral part of the box assembly.12. The vehicles according to claim 11, wherein the transmission holdingcavity is configured to contain a cooling lubricating liquid to cool thebox assembly, the cooling lubricating liquid cools the box assemblythrough the mounting plate.
 13. The vehicles according to claim 11,wherein a distance between the motor and the mounting plate is less thana preset distance such that the mounting plate cools the motor.
 14. Thevehicles according to claim 11, wherein at least one of a surface of themounting plate facing the motor and a surface of the mounting platefacing the transmission is provided with ribs, and the ribs divide aspace between the mounting plate and the motor into a plurality ofcavities.
 15. The vehicles according to claim 14, wherein the ribscomprise an annular rib extending along a circumferential direction ofthe motor.
 16. The vehicles according to claim 14, wherein the ribscomprise a plurality of strip-shaped ribs extending along a radialdirection of the motor, and the strip-shaped ribs are spaced apart alonga circumferential direction of the mounting plate, and heights of atleast a part of the strip-shaped ribs relative to the mounting plategradually decrease from a center portion of the mounting plate to aperiphery portion of the mounting.
 17. The vehicles according to claim11, wherein the box assembly comprises a transmission box and a motorbox, the transmission box comprises a front box and a rear box, themotor box comprises a motor frontend cover, a motor housing and a motorbackend cover, and the mounting plate is a part of the front box or apart of the motor frontend cover.
 18. The vehicles according to claim11, wherein the box assembly comprises a transmission box and a motorbox, the transmission box comprises a front box and a rear box, themotor box comprises a motor housing and a motor backend cover, the frontbox and the motor housing are disposed adjacent to each other, and themounting plate is a part of the front box or a part of the motorhousing.
 19. The vehicles according to claim 18, wherein the electricassembly further comprises a conductive sheet and a controller, and theconductive sheet connects the controller with the motor.
 20. Thevehicles according to claim 19, wherein the controller is mountedoutside the box assembly and fixedly connected to the box assembly.